Hi GH, All of that water demand will, most likely require a 3/4" water line, instead of the standard 1/2" water line, be piped to the shower to deliver additional volume and pressure. Without that, you will not have good performance from using multiple sprays, regardless of the valve type or diverter option. And yes, the volume is cut in half with shared functions from a diverter, but depending on the shower heads, may still be adequate. It's a balancing act, and will depend on your water pressure from the street. For a standard 1/2" diverter, to just switch between functions, the Delta R11000 rough-in body is reasonable and good quality. Then you choose the type of trim option and a 6 function cartridge. Otherwise, if 3/4" water line is at the shower, separate volume controls will allow all the functions to flow at full blast.

This is what we're thinking of putting in our kids tub/shower. I cannot find reviews of this anywhere and would like to know if it's a decent brand at least. If not, what can I do in this price range or lower that is a tub and shower combo that includes a hand shower? thanks http://www.faucetdirect.com/pfister-8p8-sth-santiago-single-handle-tub-and-handshower-trim-package/p1703050 Here is a link that might be useful: pfister santiago

One thing you might like to consider is what I did: no wall-mount shower head at all and only the hand-held shower head on a bar. This would be a way to save money, too. I had this at my old house in both the master bath and the kids' bath, and I did it again in my new house when we renovated. I really like having the hand-held for washing the walls, not just for the weekly scrub, but for rinsing after every use to get the soap off and prevent scum from forming. I also like it for washing intimate areas and the kids' hair, and it's nice to have the shower head height adjustable on a bar if any children will ever use your shower. I have never missed having a regular wall-mount shower head. I have used Grohe and Hansgrohe shower heads. One warning about the rain shower head is that some people have complained that they have insufficient force to rinse out thick hair. I have never used one, but you might look on the forum.

Black & Decker owns Price Pfister now. HD and Lowe's carry many of their items. I don't know about parts, though, as I always call Price Pfister and get the parts free under their Pforever Warranty. Kevin Just an FYI to Anewbeginning: Building a new home now and though we chose Grohe for the kitchen, the three bathrooms are all Price Pfister.